Trajectory energy dissipation,as one of main dissipation ways of hydropower stations that locate in deep valleys and with high water head and large discharge capacity,is much effective.

This paper made an overall study on the erosion control of a plunge pool for dam body flood discharge trajectory energy dissipation in the case of a narrow valley, a high arch dam and a large discharge, and its concrete lining optimization design.

Research on dynamic characteristics of original rock in the scour pit of energy dissipation of ski-jump;

Under the condition of ski-jump energy dissipation,scour hole deviated axis threaten project security.

The ski-jump energy dissipation is a method of energy dissipation, which is very commonly used in energy dissipators.

This paper introduces the geographical position of Pingshang Reservoir and the layout condition of its spillway, and analyzes the relationship between the water level of spillway and the discharge flow, and expounds the calculation of the water surface profile and energy dissipation by trajectory jet.

Based on the hydraulic model test on the spillway of Xisuixing Reservoir,this paper researches the hydraulic characteristics such as the discharge capacity,flow velocity distribution,flow states and energy dissipation by trajectory jet at the spillway exit,which can be used as a reference for similar hydraulic project.

This paper sums up the research results related to the energy dissipation scheme of spillway obtained in China and foreign countries,focusing on energy dissipation by trajectory jet,energy dissipation by underflow and energy dissipation by stepped spillway,and introduces some new type energy dissipation schemes and model test results.